Harness-operating mechanism for looms



(No Model.)

0. P. PERHAM. HARNESS OPERATING MEGHANISM FOR LOOMS. No. 562,655. Patented June 28, 1896.

Fig.

WITNESSES. INVE/VTUR fi/e f6 A TTOHNE Y.

UNITED STATES PATENT OEEIcE.

CHARLES FOSTER PERIIAM, OF LOWVELL, MASSACHUSETTS.

HARNESS-OPERATING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 562,655, dated June 23, 1896. Appli ation as June 8,1895. Serial in. 552,132. on model.)

To all whom it may concern:

Be it known that 1, CHARLES Fosrnn Pan- HAM, of Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Harness Operating Mechanism for Looms, of which the following is a specification.

This invention has reference to the mechanism which controls the movement of the harness or leashes which govern the decussation of the warps in a loom to form a shed or raceway for the weft-carrying shuttle, which mechanism is commonly termed the barness-motion or shed mechanism.

It is the object of the invention to provide such improvements in the mechanism referred to as will enable the same to be operated directly from the crank-shaft which ac- .tuates the lay, and which improvements,

when employed in connection with an improvement in picker-operating mechanism for looms described in an application filed of even date herewith, Serial No. 552,131, will obviate the necessity of a cam-shaft, simplify and cheapen the cost of construction, and render the machine easier of operation and more ready of starting and stopping.

It is also the object of the invention to provide such improvements in the means mentioned as will enable it to be more readily and quickly adjusted by the operative to conform to the desired pick, and in a similar manner to be adjusted in any order required for a particular pattern.

It is also the object of the invention to provide other improvements of greater or less importance, as will appear to those skilled in the art from the following description.

To these ends mentioned the invention consists of a shedding or harnesscontrolling mechanism directly connected with and operated from the lay-operating crank-shaft, all as I will now proceed to describe in detail, and subsequently point out with particularity in the appended claims.

Reference is to be had to the annexed drawin gs, and to the letters marked thereon, forming a part of this specification, the same letters designating the same parts or features, as the case may be, wherever they occur.

Of the drawings, Figure 1 is an end view of my improvements represented as operatively connected with a loom, only so much of the latter and its equipments being shownas it is necessary to represent in order to explain the invention. Fig. 2 is a front view of the same, a part of the central portion being shown as broken out.

In the drawings, A designates the loomframe. B is the crank-shaft, by which the lay O is operated through suitable connections. D is the breast-beam. E designates the pi cker-sticks F, the harness G, the clothroll; H, a rod extending parallel with the breast-beam and connected with the stopping mechanism, and I a holding-pawl cooperating with a ratchet-wheel J on the cloth-roll to prevent the latter from turning backward. These parts may be of the form and arrangement shown, or of any other known or suitable construction, and their functions are so well understood by those skilled in the art to which this invention appertains as not to need further description herein.

a designates a broad-rim wheel or pulley, arranged to turn on a stud or shaft 17, secured to the loom-frame and provided on the intrior of its rim with a circle of ratchet-teeth c, which may be an integral part of the rim, or be formed on a ring detachably connected with the rim.

Upon the outer surface or periphery of the rim-wheel a are detachably and adjustably secured a series of cam-rings d. But one such cam-ring is, for the sake of clearness of illustration,shown in the drawings. The camrings may be adjustably and removably held by means of an ordinary key (not shown) or by means of a spline d (see Fig. 1) or in any other suitable way. The said cam-rings are provided on their peripheries with a plurality of rises cand falls f, according, with the number of ratchet-teeth c, to the pattern to be v woven.

other end, which cord extends over suitable pulleys 'n, and is connected at'its other end with the harness F to be raised. On the lever there is a projection 0, which rests upon the periphery of the cam-ring (1, so that in the rotation of the rim-wheel with the said rings secured thereto, the rises and falls of the said rings will act upon the levers 7c and through their connections with the harness raise the latter and allow them to be depressed, it being understood that a rise '6 on a cam-ring d will operate to raise a heddle, under the arrangement shown, and that a fall f will allow the heddle to be lowered, through any of the common and known means employed in the art for the purpose, such as springs, weights, or connections with other hed'dles which opcrate to depress one set of heddles when another set is raised.

lhe finger 1), usually employed on the rod II of the common stopping mechanism, which is provided with a pin q, extending under the holding-pawl I, I elongate, as shown in Fig. l, and attach thereto one end of a cord 9",

the other end of which is connected to one of the angular ends of a rock-rod s, the other angular end of the said rock-rod being connected, by means of a cord 2, with the pawl h, so that as the rod H is rocked and the pin g on the finger 17 operates to raise the pawl I, the said finger will also, through the medium of its connections, operate to raise the pawl h, and so arrest the movement of the rimwheel a and its adjuncts.

It is obvious that the levers 7.: might be arranged above the rim-wheel and the camrings cl thereon, and the connections of the harness with the lever be made from the lower part of the latter and operate to depress the same.

\Vith this invention it will be seen that I am enabled to operate the harness-controlling mechanism directly from the lay-operating crank-shaft, and greatly simplify and cheapen the cost of construction, making the machine easier of operation and of stopping and starting, and providing more room for the clothroll and warp-beam than in looms as now most commonly organized. Besides this, the improvements provide a construction which is most ready of examination and manipulation by the weaver in case of need of turning the mechanism back or otherwise moving it without moving other parts of the loom to correspond with the required pick; and, moreover,

the mechanism is such as to materially lessen the momentum of the moving parts, so that the loom can be stopped quicker than heretofore without undue shock or jar.

As has already been intimated, the camrings 6 and their adjuncts may be increased and adjusted to any order, so as to suit any desired pattern, making the improvement, to all intents and purposes, a most efiicient, simple, and easily-adjusted dobby.

Having thus explained the nature of the invention and described a way of constructing and using the same, though without attempting to set forth all of the forms in which it may be made or all of the modes of its use, it is declared that what is claimed is' 1. A loom, comprising in its construction, a lay-operatin g crank-shaft, harness for forming the shed, a rim-wheel having a circle of internal ratchet-teeth, cam-rings on the rimwheel, and levers connected with the harness and arranged to be acted upon said cam-rings in combination with a lever operated by the crank-shaft, and having a pawl adapted to engage said internal teeth.

2. A loom, comprising in its construction. a lay-operating crank-shaft, harness for forming the shed, a second shaft, a rim-wheel thereon provided with external cam-rin gs and an internal ringof ratchet-teeth, a lever pivotedon second shaft and operatively connected with the crank-shaft, apawl on the free en d of said lever adapted to engage the ratchetteeth, and a lever adapted to be actuated and controlled by the cam-rings and operatively connected with the harness.

3. A loom, comprising in its construction. a rotary rim-wheel a, provided on its periphcry with a plurality of cam-rings cl, and on its interior with a ring of ratchet-teeth, c, a harness, and means operatively connecting the same with the-said cam-rings, in combination with a shaft, an eccentric thereon, a lever actuated by the said eccentric and provided with a pawl to engage the said ratchet-teeth to impart a step-by-step movement to the rimwheel.

4:. The combination with the rim-wheel pro vided on its periphery with a plurality of camrings, and on its interior with a ring of ratchetteeth, of the camshaft, an eccentric thereon.

a lever actuated by the said eccentric and pro- 

